import type { LLMClient, ChatParams, ChatResponse } from "./types.js";
/**
 * LLMClient implementation that wraps the Anthropic SDK.
 *
 * Converts ToolDef[] to Anthropic.Messages.Tool[] before each request,
 * converts provider-agnostic Message[] (including tool call/result variants)
 * to Anthropic MessageParam[], and normalizes Anthropic responses to
 * ChatResponse after each call.
 *
 * When promptCaching is enabled (the default), attaches ephemeral
 * cache_control breakpoints to the system prompt and up to the last 3
 * messages (system-and-last-3 strategy, capped at 4 breakpoints total).
 */
export declare class AnthropicAdapter implements LLMClient {
    private readonly client;
    private readonly promptCaching;
    constructor(apiKey?: string, opts?: {
        promptCaching?: boolean;
    });
    chat(params: ChatParams): Promise<ChatResponse>;
}
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